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[195.135.220.15]) by mx.google.com with ESMTPS id l12si1863662edi.230.2019.01.08.03.37.48 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Tue, 08 Jan 2019 03:37:48 -0800 (PST) Received-SPF: softfail (google.com: domain of transitioning jikos@kernel.org does not designate 195.135.220.15 as permitted sender) client-ip=195.135.220.15; Authentication-Results: mx.google.com; spf=softfail (google.com: domain of transitioning jikos@kernel.org does not designate 195.135.220.15 as permitted sender) smtp.mailfrom=jikos@kernel.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=kernel.org X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (unknown [195.135.220.254]) by mx1.suse.de (Postfix) with ESMTP id 2D5A8AD6F; Tue, 8 Jan 2019 11:37:48 +0000 (UTC) Date: Tue, 8 Jan 2019 12:37:46 +0100 (CET) From: Jiri Kosina To: Bernd Petrovitsch cc: Vlastimil Babka , Linus Torvalds , Andrew Morton , Greg KH , Peter Zijlstra , Michal Hocko , linux-mm@kvack.org, linux-kernel@vger.kernel.org, linux-api@vger.kernel.org Subject: Re: [PATCH] mm/mincore: allow for making sys_mincore() privileged In-Reply-To: <047f0582-a4d3-490d-7284-48dfdf9e9471@petrovitsch.priv.at> Message-ID: References: <047f0582-a4d3-490d-7284-48dfdf9e9471@petrovitsch.priv.at> User-Agent: Alpine 2.21 (LSU 202 2017-01-01) MIME-Version: 1.0 Content-Type: text/plain; charset="UTF-8" X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: Message-ID: <20190108113746.eFKL-Ah2-q76kWmoIj8DiLFpRavUkih_EOwtHH_tyjU@z> On Tue, 8 Jan 2019, Bernd Petrovitsch wrote: > Shouldn't the application use e.g. mlock()/.... to guarantee no page > faults in the first place? Calling mincore() on pages you've just mlock()ed is sort of pointless though. -- Jiri Kosina SUSE Labs